EP0171845B1 - Procédé et appareillage de traitement pyrométallurgique d'une matte plomb-cuivre en continu - Google Patents

Procédé et appareillage de traitement pyrométallurgique d'une matte plomb-cuivre en continu Download PDF

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Publication number
EP0171845B1
EP0171845B1 EP85201189A EP85201189A EP0171845B1 EP 0171845 B1 EP0171845 B1 EP 0171845B1 EP 85201189 A EP85201189 A EP 85201189A EP 85201189 A EP85201189 A EP 85201189A EP 0171845 B1 EP0171845 B1 EP 0171845B1
Authority
EP
European Patent Office
Prior art keywords
copper
lead
converter
slag
matte
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85201189A
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German (de)
English (en)
Other versions
EP0171845A1 (fr
Inventor
Gerhard Berndt
Werner Dr. Marnette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aurubis AG
Original Assignee
Norddeutsche Affinerie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norddeutsche Affinerie AG filed Critical Norddeutsche Affinerie AG
Publication of EP0171845A1 publication Critical patent/EP0171845A1/fr
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Publication of EP0171845B1 publication Critical patent/EP0171845B1/fr
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0041—Bath smelting or converting in converters

Definitions

  • the invention relates to a method for the continuous processing of copper lead bricks with a high lead content in relation to copper and to an apparatus for carrying out this method.
  • Copper lead stones are known to be intermediate products of copper or lead metallurgy.
  • the chemical composition of these copper lead stones fluctuates considerably depending on the primary raw materials used, for example within the limits of copper 15 to 50%, lead 10 to 60%, iron 0 to 30%, sulfur 10 to 25%.
  • changing levels of e.g. B. arsenic, antimony, tin and nickel can be contained in these stones.
  • low-copper copper lead stones with contents below 35% copper are concentrated to copper contents by 45% by means of a melt treatment carried out together with copper supports, such as copper-rich slags.
  • This process is generally carried out in a shaft furnace.
  • work lead which is fed to the work lead refining.
  • the concentrated copper lead stone which contains about 12 to 18% lead, is blown in batches in Pierce Smith converters to convert copper. After oxidation with atmospheric oxygen, lead and iron in particular are converted into a converter slag by adding silica carriers. Only a part of the lead (about 20%) and a part of other volatile substances are released into the fly dust of the converter.
  • DE-OS-2 941 225 discloses a continuous process for the pyrometallurgical extraction of copper from sulfidic ores or concentrates, the ores being melted to stone and primary slag and the stone being converted to blister copper and converter slag.
  • the melting process is carried out with a high excess of oxygen and a stone and a primary slag with a relatively high copper content are obtained, while the copper contained in the primary slag and converter slag is obtained by reduction.
  • the process is not geared towards low-copper ores and, in particular, no high lead-containing copper lead stones can be processed.
  • the melt pool which contains in particular considerable amounts of nickel, is kept in strong turbulence at temperatures above 1300 ° C. and, after a part of the impurities has evaporated, is oxidatively blown and the copper sulfide is blown in liquid copper transferred and refined further.
  • the impurities Se, As, Bi, Pb maximum contents of up to max. Called 0.2%.
  • the object of the invention is to process copper lead stones with a high lead content in relation to copper in an economical manner and to provide a continuous, environmentally friendly process for this purpose.
  • the object is achieved according to the invention in a process for the continuous pyrometallurgical processing of copper-poor copper lead stones, in continuously successive work steps
  • the less than 1 wt .-% lead and other impurities, such as nickel, arsenic, antimony, containing converter copper is refined by blowing or blowing in free oxygen-containing gas, whereby the impurities are slagged by selective oxidation and a pre-refined copper is produced.
  • the method according to the invention thus comprises the continuously successive sub-steps: melting and treating the copper lead stone, blowing the treated copper lead stone and refining the resulting converter copper.
  • thermodynamic variables determining the process steps are the temperature and the oxygen partial pressure.
  • the temperature is determined by the entry of fuel and the heat of reaction of the metallurgical reactions.
  • the required oxygen partial pressure is set by specifying the fuel / oxygen ratios. In order to improve the evaporation kinetics or the mass exchange, a high bath turbulence is brought about, in particular in the melting process.
  • copper lead stones of the composition 15 to 50% Cu, 10 to 60% Pb, 10 to 25% S, 0 to 30% Fe and conventional impurities are used.
  • the weight ratio of copper to lead is between 1: 1 and 3: 1.
  • Pre-broken copper lead stone 3 for example of the composition 42% Cu, 40% Pb, 16% S, is introduced into the shaft 2 of the melting and volatilization furnace of FIG. 1 via gas-tight charging closures 4.
  • the copper lead stone here forms a bed column 5, which rests on the base of the hearth furnace 1 and is quenched into the hearth space.
  • the copper lead stone is melted in the area of the embankment and forms the liquid stone melt 7.
  • the pillar 5 sinks continuously and thus allows a constant recharging of broken copper lead stone.
  • the stone melt 7 formed in the hearth is brought to temperatures above 1,250 ° C., thus creating the prerequisites for the volatilization of volatilizable elements, in particular lead and arsenic.
  • a strong turbulence is generated within the melt by injecting or blowing in purging gas 8, such as air or inert gas, with the aid of purging nozzles 9, and thus an optimization of the evaporation kinetics is brought about.
  • the burner or burners 6 are operated with either a reducing, neutral or oxidizing flame.
  • Neutral or reducing conditions in connection with inert purge gas are set when processing iron-free copper lead stones.
  • Oxidizing conditions in connection with neutral or oxidizing purge gas are used in the processing of iron-containing copper lead stones, for example the composition 46% Cu, 18% Pb, 20% S, 10% Fe.
  • the copper lead stone used is calcium oxide, e.g. B. in the form of limestone, so that a lime ferrite slag with about 10 to 20 wt .-% Ca0 forms. Slags of this composition have a low solubility for lead and promote lead volatilization by increasing their activity.
  • a copper-containing lead alloy 12 collects in the sump of the hearth 1 in accordance with the copper-lead-sulfur melting system a content of more than 50% Pb, which is tapped via stitch 13.
  • the treated copper lead stone 14 whose copper content is approximately 60% and which has a lead content of less than 20%, flows continuously out of the furnace at the stone engraving and then enters the blow-molding process.
  • the lead introduced with the copper lead stone is evaporated, transferred into the flying dust of the melting furnace and discharged with the S0 2 -containing gases 10.
  • the corresponding flying dust contains more than 45% by weight lead.
  • the treated stone 14 is continuously blown into converter copper in a downstream blast furnace.
  • An example of a suitable blowing furnace is shown in FIG. 2.
  • This blow furnace consists of a fireproof-lined furnace vessel 15, which is either channel-shaped with a round or rectangular cross section.
  • the inlet opening 16 for the treated copper lead 14 and the outlet opening 17 for the converter copper 18 are located on the end faces.
  • the outlet for the converter copper is designed in the form of a continuous siphon stitch (not shown in the figure).
  • One or more nozzles 21 are arranged in the furnace ceiling or in the side walls of the blow furnace. With the help of these nozzles, air or oxygen-enriched air is blown onto or into the melt in order to carry out the metallurgical fading reactions.
  • a decisive factor for the volatilization of volatilizable impurities is again a temperature above 1250 ° C in the melt as well as a high bath turbulence.
  • the volume flow of the blowing wind 22 and the inflow quantity of the stone 14 from the melting furnace are coordinated with one another in such a way that a converter copper with less than 1% lead is continuously discharged from the blowing furnace.
  • the resulting converter slag should have a copper / lead mass ratio of at least 1, i. H. part of the copper must be oxidized.
  • blowing wind 22 required for the reactions is injected onto the melt with high kinetic energy either perpendicularly or at an oblique angle to the bath surface.
  • high kinetic energy either perpendicularly or at an oblique angle to the bath surface.
  • blowing wind directly into the metal bath via lower bath jets there is also the possibility of introducing the blowing wind directly into the metal bath via lower bath jets.
  • lime 24 can be added to form a calcareous converter slag.
  • the converter copper 18 formed contains, in addition to other impurities, lead in an amount of less than 1% by weight.
  • This converter copper is refined in a refining furnace downstream of the converter, whereby lead contents of less than 0.2% are achieved.
  • FIG. 3 An example of a suitable refining furnace is shown in FIG. 3.
  • impurities in the copper such as lead and antimony
  • air or oxygen-enriched air 27 in a manner known per se by means of partial oxidation and bound as oxides with the aid of slag formers.
  • a slag containing silica is preferably used for the slag formation.
  • the refining effect can be significantly increased by suitable additives to this slag, such as boron oxide, since this reduces the activity of the impurities in the slag.
  • the resulting slag 29 can in a separate reduction process by reducing the impurities, such as. B. lead, antimony, and be processed by forming a lead alloy and thus again used as refining slag 28 for the refining of the converter copper 18.
  • the treatment of the converter copper 18 takes place continuously.
  • the oxidation of the impurities contained in the copper 18 required air 27 is injected onto the melt by inflation lances 30.
  • the resulting slag 29 runs out of the refining furnace via the stitch 31.
  • the refined converter copper 33 leaves the furnace via a stitch 34.
  • the refining furnace is heated with the burner 32 to cover heat losses.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (6)

1. Procédé de traitement pyrométallurgique en continu de mattes plomb-cuivre, pauvres en cuivre, avec les stades opératoires successifs en continu, qui consiste
a) dans un premier stade du procédé, à faire fondre de la matte plomb-cuivre se composant de 15 à 50 % de cuivre, de 10 à 60 % de plomb, de 10 à 25 % de soufre, de 0 à 30 % de fer et des impuretés habituelles dans un four de fusion, à produire dans la masse fondue dans des conditions reductrices, neutres ou oxydantes et à des températures supérieures à 12500 C, une grande turbulence par introduction ou par insufflation de gaz, à évaporer des constituants volatils de plomb et, le cas échéant, d'autres substances susceptibles de se volatiliser et à les transformer en cendre volante et à produire une matte liquide enrichie en cuivre, ayant moins de 20 % en poids de plomb, ainsi que du plomb d'oeuvre métallique sous forme d'un alliage de plomb contenant du cuivre et à les évacuer séparément,
b) dans un deuxième stade du procédé, à former par introduction ou par insufflation de gaz contenant de l'oxygène libre à des températures supérieures à 1250°C, à partir de la matte liquide produite suivant le stade (a), en coexistence, une scorie de convertisseur riche en oxygène et un cuivre de convertisseur ayant une teneur en plomb inférieure à 1 % en poids et, en même temps, à transformer dans une grande mesure en une cendre volante les impuretés présentes dans la matte et susceptibles d'être volatilisées, et
c) dans un troisième stade du procédé, à raffiner le cuivre de convertisseur, contenant moins de 1 % en poids de plomb et d'autres impuretés, comme du nickel, de l'arsenic, de l'antimoine, par introduction ou par insufflation d'un gaz contenant de l'oxygène libre, les impuretés étant ainsi scorifiées par oxydation sélective et du cuivre préraffiné étant ainsi obtenu.
2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à oxyder, pour des mattes de plomb-cuivre contenant du fer, le fer pendant le processus de fusion par introduction ou insufflation d'un gaz contenant de l'oxygène libre et à le transformer, par addition de sources de CaO, en une scorie de ferrite de chaux ayant de 10 à 20 % environ en poids de CaO.
3. Procédé suivant la revendication 1, caractérisé en. ce qu'il consiste à brûler en atmosphère neutre ou réductrice, dans le cas de mattes de plomb- cuivre pauvres en fer, le combustible utilisé pour la fusion et la surchauffe de la matte de plomb- cuivre et à produire la turbulence du bain qui est nécessaire à la volatilisation des impuretés par introduction ou par insufflation d'un gaz inerte.
4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce qu'il consiste à obtenir dans le processus de fusion une matte partiellement chargée de plomb, d'une composition correspondant aux démixtions présentes dans le système d'équilibre cuivre-plomb-soufre et un alliage métallique coexistant, ayant des teneurs en plomb supérieures à 50 % et à soutirer les deux phases séparément l'une de l'autre.
5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à ajouter des composés oxydés comme Si02, B203 lors du raffinage de la scorie provenant du cuivre de convertisseur.
6. Appareillage de mise en oeuvre du procédé suivant l'une des revendications 1 à 5, qui comprend les équipements suivants communiquant entre eux en vue d'assurer un écoulement massique continu entre les fours:
a) un équipement de fusion (E), constitué d'un puits (2) et d'une sole qui communique avec celui-ci, comprenant des moyens (4) pour amener en continu la matte de cuivre (3) à fondre, au moins un brûleur (6), ainsi que des moyens (6, 9) pour amener en continu de manière réglable du combustible, du gaz contenant de l'oxygène libre et du gaz de balayage et des moyens (10, 11, 13) pour soutirer de manière séparée la matte fondue (14) traitée, la scorie (11a), l'alliage de cuivre riche en plomb (12) et l'effluent gazeux (10);
b) un four (V) pour convertir la matte fondue (14) traitée en cuivre de convertisseur, comprenant des dispositifs (16) pour amener la matte fondue (14) de l'équipement de fusion (E) ainsi que pour amener des agents de réaction (22, 24), et des orifices (17, 19) pour soutirer de manière séparée du cuivre de convertisseur (18) liquide, de la scorie de convertisseur (20) liquide et de l'effluent gazeux (23);
c) un four de raffinage (R) du cuivre de convertisseur comprenant des dispositifs (25, 28, 30) pour amener du cuivre de convertisseur (18) liquide ainsi que des agents de réaction, et des orifices (31, 34) pour soutirer de manière séparée de la scorie de raffinage (29), du cuivre de convertisseur (33) purifié et de l'effluent gazeux (35).
EP85201189A 1984-08-16 1985-07-13 Procédé et appareillage de traitement pyrométallurgique d'une matte plomb-cuivre en continu Expired EP0171845B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3429972 1984-08-16
DE19843429972 DE3429972A1 (de) 1984-08-16 1984-08-16 Verfahren und vorrichtung zur kontinuierlichen pyrometallurgischen verarbeitung von kupferbleistein

Publications (2)

Publication Number Publication Date
EP0171845A1 EP0171845A1 (fr) 1986-02-19
EP0171845B1 true EP0171845B1 (fr) 1988-09-21

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EP85201189A Expired EP0171845B1 (fr) 1984-08-16 1985-07-13 Procédé et appareillage de traitement pyrométallurgique d'une matte plomb-cuivre en continu

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Country Link
US (1) US4614541A (fr)
EP (1) EP0171845B1 (fr)
JP (1) JPS6156258A (fr)
AU (1) AU568280B2 (fr)
DD (1) DD238398A5 (fr)
DE (2) DE3429972A1 (fr)
FI (1) FI78506C (fr)
PL (1) PL140608B2 (fr)
YU (1) YU108585A (fr)

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
JP2682636B2 (ja) * 1988-04-19 1997-11-26 住友金属鉱山株式会社 自熔製錬炉の操業方法
JP2689540B2 (ja) * 1988-11-21 1997-12-10 三菱マテリアル株式会社 低酸素含有銅の製造方法及び製造装置
JP2001302942A (ja) 2000-02-14 2001-10-31 Miyoshi Kasei Kk 新規複合粉体及びこれを配合した化粧料
FI110873B (fi) * 2001-10-26 2003-04-15 Outokumpu Oy Laitteisto ja menetelmä sulafaasin laskemiseksi sulatusuunista
WO2017031574A1 (fr) 2015-08-24 2017-03-02 5N Plus Inc. Procédés de préparation de divers métaux et de leurs dérivés à partir d'un matériau contenant du cuivre et du soufre
EP3504020B1 (fr) 2016-08-24 2023-04-19 5n Plus Inc. Procédés de fabrication par atomisation de poudres de métal ou d'alliage à bas point de fusion
BE1025775B1 (nl) * 2017-12-14 2019-07-11 Metallo Belgium Verbeterde soldeerproductiewerkwijze
US11084095B2 (en) 2018-02-15 2021-08-10 5N Plus Inc. High melting point metal or alloy powders atomization manufacturing processes
CN113667836A (zh) * 2021-07-08 2021-11-19 赤峰大井子矿业有限公司 一种可实现有价金属回收的锡冶炼方法
CN118006917A (zh) * 2024-04-08 2024-05-10 北京科技大学 一种电解铅重熔过程氧化铅渣源头减量的方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1003026A (en) * 1963-02-21 1965-09-02 Farnsfield Ltd Continuous production of furnace products
GB1130255A (en) * 1965-11-22 1968-10-16 Conzinc Riotinto Ltd Reverberatory smelting of copper concentrates
CA867672A (en) * 1968-05-02 1971-04-06 The International Nickel Company Of Canada Fire refining of copper
FI52358C (fi) * 1974-11-11 1977-08-10 Outokumpu Oy Tapa valmistaa raakakuparia jatkuvasti yhdessä vaiheessa epäpuhtaasta sulfidisesta kuparirikasteesta tai -malmista .
LU75732A1 (fr) * 1976-09-06 1978-04-27
DE2941225A1 (de) * 1979-10-11 1981-04-23 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und vorrichtung zur pyrometallurgischen gewinnung von kupfer

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Publication number Publication date
FI78506C (fi) 1989-08-10
DD238398A5 (de) 1986-08-20
FI852316A0 (fi) 1985-06-11
FI852316L (fi) 1986-02-17
EP0171845A1 (fr) 1986-02-19
DE3565125D1 (en) 1988-10-27
DE3429972A1 (de) 1986-02-27
PL254667A2 (en) 1986-06-17
AU4624085A (en) 1986-02-20
PL140608B2 (en) 1987-05-30
YU108585A (en) 1988-02-29
AU568280B2 (en) 1987-12-17
JPS6156258A (ja) 1986-03-20
FI78506B (fi) 1989-04-28
US4614541A (en) 1986-09-30

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